Timer.



A, R. MOSLER.

TIMER,

APPLIGATION FILED Nov. m, 190s.

1,052,743. Patented Feb. 11, 1913.

UNITED sica'rns rar-Entr ernten.

ARTHUR R. MOSLER, 0F. NEW YELK, lll. Y., ASSIGNOR T0 A. R. MOSLER @E YORK, N. Y., A CECPOR-ATID-i" O.' NEW-YORK.

TIMER.

To all whom it may concern Be it known thatI I, ARTH Un R. MosLEn, a citizen of the United States, and resident of the borough of Manhattan, in the city and State of New York, have invented a new and useful Improvement in Timers, of which the following is a specification.

My invention relates to timers and has for its objects to provide certain improvements in the form, 'construction and arrangement of the contacts of a timer whereby there will be insured for the contacts a longer life and a. more perfect electric connect-ion.

Another object is to provide a laminated contact composed of metals of different degrees of hardness and differentdegrees of conductivity. v

A. further object is to provide the combination of a spring pressed roller contact with the said laminated contact-composed of metals of different degrees of hardness and different degrees of conductivity.

A practical embodiment of my invention is shown in the accompanying drawings in which,

Figure 1 is a front view of myimproved timer with the cover removed, Fig. '2 is a` section taken in the plane of the line .fkof Fig. 1, looking in the direction of 'the arrows, Fig. 3 is a section taken in the pl ane of the line B-*B of Fig. 2, looking in the direction of the arrows, and Fig. #l is a rear view of my improved timer.

The shell of the timer is denoted by 1 and is made of any effective insulating material, such as hard liber. It carries one or more of the fixed contacts Q, in the present instance four, and their binding posts El., The front of the shell is provided with a removable cover el. T he shell l'l secured to the flange 5 of the sleeve G, in the present instance b v means of screws The sleeve G is rotatably mounted on the hollow shaft S and has a plain bearing thereon. A guide piece 9 is secured to the inner end of the shaft S. in the present instance by means of a screw plug l0. 1

The rotary contact comprises a transversely sliding arm having a flat section 1t and a bent section l2 secured face to face with one end of the bent s ,etion spaced from the corresponding end of the 'lat section: a pivotpintle 13 exteiniling from one of the corresponding ends to the other; a divided ball race- 1'-l iixedly mounted on said pintlc;

Speccation of Letters Patent.

balls iti in said race;

Application filed November 19,-1908. Serial Een. e-,f%?ii.

contact roller 16 mounted on said balie; and a spring 17 placed between the bent section of the arm and the guide piece E.

The arm 11,` 12, slotted for a. port-ion of its length, as shown at 18, to allowvit a longitudinal sliding movement on the 'fixed sectional guide piece 9, and cotter pins 19 serve to hold it in place thereon. The contact roller 16 is. normally held ingengagement with the shell l by the spring 17, and the said spring also serves to take up any The fixed laminated contacts 2 are com-k posed of metals of different degrees of hardness and of different degrees of conductivity. In the preferred form, there are two laminae each of steel, brass and copper. The result of this arrangement is a Contact which has a high degree of electric conductivity because of the use of metals having that property and also of great durability because of the use of metals having thatl quality. The contact roller is preferably made of metal equal. in durability to the hardest metal used in the fixed laminated contacts. The provision of the laminse of great dura-- bility, such as steel, in the tixed contacts and the provision of a contact roller of equal durability serves to reduce the wear upon the laminze of the fixed contacts which have a high degree of electric conductivity. The flange 5 carries the usual arm 20 for conveniently advancing or retarding the time of contact in practice. A collar 21 about the hollow shaft 8 is provided for holding the parts in assembled position. This collar' is held in place by set screws Q2 which also serve to hold the timer on a driving shaft, not shown.

It is to be understood that l do not wish to limit myself strictly to the form and ar-- rangement of the parts herein set forth as .many different arrangements may be resorted to 'without departing from the spirit and scope of my invention.

lvvhat l claim is:

l. ln a timer. the combination of two contacts. one movable with respect to the other, one composed of laminated nietalsof different degrees of hardness andelectrical conductivity and the other composed of metal equal in hardness to the hardest metal in the laminated contact, the aminte of the first mentioned contactl lying in the plane of aga movement of the one Acontact with respect to the other, l

2., lin a timer, the combination ot two contacts, one movable with respect to the other one composed of three laminated metals of dierent degrees -of hardness 'and electric conductivity and the other composed of metal equal in hardness to the hardest metal in the laminated contact,y the laminas of the first 'mentioned contact lying in the plane o' movement of the one contact with respect to the other. A v.

S. in a, timer, the combination of twol contacts, movable lWith respectto each' other, one contact being` composed of laminasv ot' steel, brass and copper, and the .other con.- tact being composed of steel, the said lamin lying in the plane of lmovement of one Contact With'respect to theother.

noemde 4. A timer comprising a rotary member, 20

.an angular guide piece fxedly mounted thereon with one end projecting therefrom, en arm provided with a slot fitted tol surround said guide piece and be i'n-slidable engagement therewith, a Contact roller carried by said arm, and a spring interposed between the arm and the projecting'end of the gide'piece for tending to hold the arm at the limit of its outward movement.

ln testimony, that I claim the foregoing 30 l as my invention, I have signed my name in presence of two Witnesses, thls twentysecond day of October, y1908.

ARTHUR R. MO SLER. 

